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Mount Si Road Bridge

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Overview
Parker through truss bridge over Middle Fork Snoqualmie River on Mount Si Road
Location
King County, Washington
Status
Open to traffic
History
Built 2008
Builders
- Andersen Bjornstad Kane Jacobs (Design Engineers)
- Mowat Construction Co. (Contractor)
Design
Parker through truss
2009: American Institute of Steel Construction Merit Award - Medium Span
Dimensions
Length of largest span: 240.2 ft.
Total length: 365.2 ft.
Deck width: 40.0 ft.
Approximate latitude, longitude
+47.48667, -121.76000   (decimal degrees)
47°29'12" N, 121°45'36" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/593411/5259993 (zone/easting/northing)
USGS topographic map
North Bend
Inventory number
BH 52054 (Bridgehunter.com ID)
Inspection (as of 10/2010)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Very Good (8 out of 9)
Substructure condition rating: Very Good (8 out of 9)
Sufficiency rating: 75.0 (out of 100)
Average daily traffic (as of 2008)
3,000

Update Log 

  • April 12, 2012: Essay added by Mike Goff

Sources